Method and apparatus for taking-up yarn



June10,'1969, F. L. STOLLER 3, 48,570

METHOD AND APPARATUS FOR TAKING*-UP YARN Filed Jan. 2. 1968 INVENTOR. F.L. STOLLER A T TORNE' VS United States Patent Ofiice 3,448,570 PatentedJune 10, 1969 3,448,570 METHOD AND APPARATUS FOR TAKING-UP YARNFrederick L. Stoller, Greenville, S.C., assiguor to Phillips PetroleumCompany, a corporation of Delaware Filed Jan. 2, 1968, Ser. No. 694,970Int. Cl. D01h 13/26, 7/92, 7/46 US. C]. 57-34 Claims ABSTRACT OF THEDISCLOSURE r This invention relates to taking-up yarn onto a package. Inone aspect the invention relates to an improved integral combination ofyarn winding apparatus. In another aspect the invention relates to animproved method of taking-up yarn.

When taking up yarn onto a package, the yarn is usually traversed alongthe length of the package so that the yarn is distributed evenly overthe cylindrical surface of the package. One method of traversing theyarn utilizes an open lfiace cam or grooved roller, containing doublereversed intersecting helical grooves which guide the yarn in a traversepath as the cam is rotated. This method has proved satisfactory fortaking up twisted yarns but when utilized to wind untwisted yarns,several problems occur. The twist free filament bundle tends to assume aribbon form when it comes into contact with the grooved surface,increasing the yarn with to the extent that entry into the guide grooveis difiicult. The absence of twist allows the excursion of individualfilament which results in splitting of the yarn with part of the yarnentering the groove and traversing while the other portion remains onthe surface of the roller.

By the practice of the invention wherein a false twist is imparted tothe yarn befiore it is passed to the grooved roller, these diflicultiesare eliminated.

Accordingly it is an object of the invention to provide an integralcombination of apparatus for efliciently taking up yarn.

Another object of the invention is to provide an improved method ofwinding yarn onto a package.

Another obect of the invention is to treat untwi'sted yarn so that itcan be wound onto a package iby utilizing a grooved winding roller.

These and other objects of the invention will be apparent to one skilledin the art upon consideration of the following disclosure, the drawingsand appended claims.

FIGURE 1 is a perspective View of the apparatus of the invention.

FIGURE 2 is a cross sectional view of a twisting jet.

According to the invention, in yarn take-up apparatus including a rollerhaving grooves to guide the yarn in a traversing path, drive means forrotating the grooved roller and a yarn package rotatably mounted ontowhich the yarn is wound, there is provided the improvement comprising afluid jet mounted in the path of the yarn being passed 'to the roller;the jet having a yarn passageway and a fluid conduit intersecting thepassageway tangentially to impart false twist to the yarn as it movesthrough the passageway.

In one embodiment of the apparatus the fluid jet is pivotally mounted sothat the yarn passageway moves in an are following the traversing motionof the yarn thread line as it is being wound onto the package.

Further in accordance with the invention, there is pro vided in a methodof taking up untwisted y-arn including passing yarn to a grooved winduproller and onto a yarn package the improvement comprising subjectingsaid yarn to the action of a fluid vortex to impart sufiicient falsetwist so that a coherent yarn bundle is presented to the groove-dportion of the windup roller. The fluid vortex is created in the yarnpassageway of a fluid jet by introducing a pressurized fluidtangentially to the axis of the yarn path. The fluid is introduced at apressure sufficient to cause the yarn bundle to rotate as it movesthrough the passageway, twisting in opposite directions down-stream andupstream from the fluid jet. Snubbing of the yarn against the rollergrooves causes removal of the (false twist. The method results inavoiding the splitting and ribbon'ing of yarn as it enters the groove ofthe windup roller.

FIGURE 1 illustrates the apparatus of the invention, including a fluidtwisting jet 1.0 and .a grooved wind-up roller 20. The twisting meanscomprises a yarn passageway 1 1 and a fluid conduit 12 as will .bedescribed in detail with reference to FIGURE 2. The yarn 30 passesthrough jet 10, receiving fialse twist,-and is passed to the guidegrooves of windup roller 20. The surface of roller 20 contains a righthand helical groove 21 and intersecting left hand helical groove 22. Theroller is mounted on shaft 213 and rotated by drive means not shown. Ayarn package 26 such as a bobbin or pirn is mounted on freely rotatingshaft 27. Shaft 27 is carried upon a tension arm (not shown) whichmaintains package 26 in frictional contact with roller 20. As roller 20rotates and drives package 26, the yarn 30 follows the grooves andtraverses as it is wound onto the package.

FIGURE 2 is a cross-sectional view of jet 10 illustrating the yarnpassageway 11 and tangential fluid conduit 12. Tangential is used in abro-ad sense to describe the intersection of the yarn passageway by thefluid conduit at an angle such that the yarn bundle is rotated about itsaxial center lines by fluid introduced through the conduit. A stringupslot .13 is cut through the length of jet 10 to facilitate insertion ofthe yarn into the jet. The jet is pivotally mounted as shown at 14 and15 to allow the jet to rotate and traverse with the yarn. In operation,pressurized fluid, such as air is introduced through conduit 12,screening the .stringup slot and creating the fluid vortex. The fluidacts upon the periphery of the yarn bundle moving through passageway .11causing it to rotate twisting in one direction downstream and theopposite direction upstream. False twist of /2 t.p.i. is suflicient toprovide a coherent yarn bundle if the fluid jet is mounted in closeproximity to the winding roller. It is generally necessary to avoidsnubbing the yarn against any surfiaces as it is passed from the jet.This can be accomplished by suitable design of the yarn exhaust port ofa passageway 1 1 or by pivotally mounting the jet as illustrated.

It :is readily apparent that by false twisting the yarn a coherent yarnbundle is passed to the groove of the Windup roller and that thesplaying and splitting problem encountered in winding zero twist yarn isavoided.

That which is claimed is:

1. ln yarn take-up apparatus including in combination a roller, groovedto guide yarn in a traversing path; drive means to rotate the groovedroller; and a yarn package rotatably mounted onto which the yarn iswound the improvement comprising a fluid twisting jet mounted in thepath of yarn being passed to said grooved roller, said jet having a yarnpassageway and a fluid conduit intersecting said passagewaytangentially.

2. The apparatus of claim 1 wherein said fluid twisting jet is pivotallymounted to allow the yarn passageway to move in an arc and follow thetraversing motion of said yarn.

3. The apparatus of claim 1 including means to introduce pressurizedfluid into the fluid conduit of said jet.

4. In a method of taking-up untwisted yarn including passing said yarnto the grooved portion of an open cam winder and onto a yarn package theimprovement comprising subjecting said yarn to the action of a fluidvortex twister to impart false twist sufiioient to present a coherentyarn bundle to the groove of said roller of said winder.

5. The method of claim 4 wherein false twist of at least /2 turn perinch is imparted to said yarn.

References Cited UNITED STATES PATENTS DONALD E. WATKINS, PrimaryExaminer.

US. Cl. X.R.

